Analysis of process parameters effects on dissimilar friction stir welding of AA1100 and A441 AISI steel

Derazkola, Hesamoddin Aghajani; Aval, Hamed Jamshidi; Elyasi, Majid

doi:10.1179/1362171815y.0000000038

Cited by 85 publications

(27 citation statements)

References 19 publications

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“…The FSW tool, during travelling, forwards the plastic materials from front to rear side with forging force and combines them. 1 The side of weld where the sense of tangential velocity of the rotating tool is parallel to the sense of the tool traverse is termed as advancing side (AS), and if opposite, retreating side (RS). 2 Existing disturbances and heat in FSW are causing changes in the impurities’ distribution and the grain size surrounding and the joint centre.…”

Section: Introductionmentioning

confidence: 99%

Investigations of tool tilt angle on properties friction stir welding of A441 AISI to AA1100 aluminium

Elyasi

Derazkola

Hosseinzadeh

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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The aim of this article is the investigation of the effects of tool tilt angle on the friction stir welding of aluminium to the steel butt joint. For this purpose, 1°, 2° and 3° tilt angles are selected to friction stir welding of AA1100 to A441 AISI, while the other process parameters (i.e. tool rotational speed, travelling speed, tool offset and plunge depth) kept constant. The results showed that with increasing tool tilt angle, the interaction between two metals and axial force increased. The increasing tool tilt angle caused more surfaces to mingle, internal mixing and frictional heat generation. The results of the microstructure of joints revealed that the AA1100 microstructure is more thermo-mechanically affected than A441 AISI. The AA1100 average grain sizes at stir zone were 1.2, 1.6 and 2 µm and at A441 AISI were 6, 7 and 9 µm at 1°, 2° and 3° tilt angles, respectively. The maximum tensile strength of joints was 75% of the aluminium base metal, which was produced at 2° tilt angle. The higher heat generation and axial force at upper tilt angle cause separation of the steel fragments on the aluminium matrix and formation of Al-Fe intermetallic compound. These phenomena lead to increase in the micro-hardness of the joint at the upper tool tilt angle.

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Section: Introductionmentioning

confidence: 99%

Investigations of tool tilt angle on properties friction stir welding of A441 AISI to AA1100 aluminium

Elyasi

Derazkola

Hosseinzadeh

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…The nugget zone of this welded specimen is found to be completely free from various defects, such as porosity, tunnel voids, excessive flash, kissing bond defects, defective tightness, onion skin microstructures, cracksimilar root flaws, etc. [31] to [33]. Fig.…”

Section: Confirming the Competence Of Established Modelmentioning

confidence: 98%

Experimental Identification of Optimized Process Parameters for FSW of AZ91C Mg Alloy Using Quadratic Regression Models

Satheesh¹,

Sevvel²,

R³

2020

SV-JME

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This experimental work aims to devise and establish quadratic regression equations, including various input criteria of a friction stir welding (FSW) technique to predict and determine the responses during the fabrication of AZ91C Mg alloy joints. The input process parameters taken into consideration include the traversing speed of the tool, the speed of rotation of the tool, its pin profile (geometry) and the axial force. A five-level, 4 four-factor composite design (of central nature) was applied, and response surface methodology (RSM) was used to formulate quadratic regression models, to develop 3D response surface charts, and to anticipate the responses for various mechanical properties. The generated quadratic mathematical model was tested and validated using the technique of analysis of variance. Validation experimental trial results outlined in the form of scatter diagrams revealed precedented coincidence with that of the generated models. The AZ91C Mg alloy joints obtained using the tool having taper cylindrical pin geometry employed at 1045 rpm, 1.5 mm/s traversing speed, under the exertion of an axial load of 4.87 kN was found to exhibit improved mechanical properties.

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“…The applied force for material flow is highly affected by tool tilt angle (TTA), which is an angle with negative position from forward transverse direction [20,21]. After passing the tool from SZ, the axial force causes the extruded material to fill the weld seam [22]. Three-dimensional observation of the joint area has indicated that the cross section consists of 4 main regions [23], that are schematically shown in Figure 6 passing the tool from SZ, the axial force causes the extruded material to fill the weld seam [22].…”

Section: Materials Flowmentioning

confidence: 99%

“…After passing the tool from SZ, the axial force causes the extruded material to fill the weld seam [22]. Three-dimensional observation of the joint area has indicated that the cross section consists of 4 main regions [23], that are schematically shown in Figure 6 passing the tool from SZ, the axial force causes the extruded material to fill the weld seam [22]. Threedimensional observation of the joint area has indicated that the cross section consists of 4 main regions [23], that are schematically shown in Figure 6: [20].…”

Section: Materials Flowmentioning

confidence: 99%

Friction Stir Welding and Friction Spot Stir Welding Processes of Polymers—State of the Art

2020

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In the last decade, the friction stir welding of polymers has been increasingly investigated by the means of more and more sophisticated approaches. Since the early studies, which were aimed at proving the feasibility of the process for polymers and identifying suitable processing windows, great improvements have been achieved. This owes to the increasing care of academic researchers and industrial demands. These improvements have their roots in the promising results from pioneer studies; however, they are also the fruits of the adoption of more comprehensive approaches and the multidisciplinary analyses of results. The introduction of instrumented machines has enabled the online measurement of processing loads and temperature, and critical understanding of the principal aspects affecting the material flow and welds quality. Such improvements are also clearly demonstrated by the increase of the strength of recent joints (up to 99% of joining efficiency) as compared to those reached in early researches (almost 47%). This article provides a comprehensive review of the recent progresses on the process fundamentals, quality assessment and the influence of process parameters on the mechanical behavior. In addition, emphasis is given to new developments and future perspectives.

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Analysis of process parameters effects on dissimilar friction stir welding of AA1100 and A441 AISI steel

Cited by 85 publications

References 19 publications

Investigations of tool tilt angle on properties friction stir welding of A441 AISI to AA1100 aluminium

Investigations of tool tilt angle on properties friction stir welding of A441 AISI to AA1100 aluminium

Experimental Identification of Optimized Process Parameters for FSW of AZ91C Mg Alloy Using Quadratic Regression Models

Friction Stir Welding and Friction Spot Stir Welding Processes of Polymers—State of the Art

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